Head stereotactic radiotherapy fixing frame

Abstract

The utility model discloses a head stereotactic radiotherapy fixing frame, which comprises a body template, a headrest, a frame, a lower thermoplastic mold, an upper thermoplastic mold, a positioning frame and a fixing pin, the outline of the frame is matched with the shape of the head and the shoulder of a human body, the thickness of the head of the frame is thinner, the thickness of the shoulder and neck of the frame is thicker, the bottom of the frame is connected with a back plate, and the headrest is positioned and placed on the body template. Positioning columns corresponding to the positioning holes are arranged at the bottom of the frame, corresponding fixing holes and via holes are formed in the top of the frame, bolt sleeves are embedded in the fixing holes and the head positioning holes, the lower thermoplastic mold is placed on the frame, the outline of the positioning frame is the same as that of the frame, and through holes corresponding to the fixing holes and the via holes one to one are formed in the positioning frame. And a fixing pin is inserted into the bolt sleeve from top to bottom to connect the frame, the lower thermoplastic mold and the upper thermoplastic mold into a whole. According to the utility model, the wrapping performance of the afterbrain, the head top, the two sides of the rear neck and the shoulder back side of a patient and the repeatability of radiotherapy body positions are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of radiotherapy equipment, in particular to a head stereotactic radiotherapy fixing frame. Background Art

[0002] With the development of linear accelerator image-guided radiotherapy technology, stereotactic radiotherapy of the head can achieve accurate radiotherapy of intracranial lesions by adopting non-invasive fixation and image guidance. The commonly used non-invasive fixation method in clinical practice is to fix the head radiotherapy position by body template, head fixation frame, and positioning film frame. The body template is installed on the radiotherapy bed, the patient lies on the body template, the head fixation frame is placed on the body template along the patient's head, the positioning film frame is covered on the head fixation frame, and the body template, head fixation frame, and positioning film frame are fixed together from top to bottom with fixing pins. The positioning surface in the positioning film frame is close to the patient's face, the patient's head is fixed, and then the radiotherapy bed is started for treatment. However, the conventional head fixation mold does not wrap the back of the patient's head well, and the contact part of the patient's neck with the headrest and the body template is greatly affected by the patient's body shape. The neck and shoulders of thin patients are prone to hanging in the air, resulting in poor fit, and the fatter patients' neck fat is prone to stacking, resulting in unsatisfactory position repeatability. Utility Model Content

[0003] In order to solve the defects of the above-mentioned prior art, the utility model provides a head stereotactic radiotherapy fixation frame to improve the wrapping of the patient's back of the head, top of the head, both sides of the back of the neck, and the back of the shoulders as well as the repeatability of the radiotherapy position.

[0004] In order to achieve the above technical purpose, the technical solution adopted by the utility model is:

[0005] A head stereotactic radiotherapy fixation frame comprises a body template, a headrest, a frame, a lower thermoplastic mold, an upper thermoplastic mold, a positioning frame, and a fixing pin. Positioning holes are arranged along the contours of the head, shoulders, and neck of the body template. The contour of the frame is adapted to the shape of the head and shoulders of the human body. The thickness of the frame at the head position is relatively thin, and the thickness at the shoulder and neck position is relatively thick and connected to a back plate at the bottom. The headrest is positioned and placed on the body template. Positioning columns corresponding to the positioning holes at the same positions are arranged at the bottom of the frame at the shoulder and neck positions. Fixing holes corresponding to the positioning columns at the same positions are arranged at the top. The fixing holes are embedded in the fixing holes. A latch sleeve is provided, and a through hole corresponding to the positioning hole at the same position is provided at the head position of the frame. A latch sleeve is buried in the positioning hole corresponding to the through hole. The lower thermoplastic mold is placed on the frame, and the upper thermoplastic mold is placed on the lower thermoplastic mold. Holes corresponding to the positioning holes are provided on the edges of the lower thermoplastic mold and the upper thermoplastic mold. The positioning frame has the same contour as the frame, and is provided with through holes corresponding to the fixing holes and the through holes. The body template and the frame are connected by positioning columns and positioning holes, and the frame, the lower thermoplastic mold, and the upper thermoplastic mold are connected as a whole by inserting fixing pins into the latch sleeve from top to bottom.

[0006] Furthermore, the lower thermoplastic mold and the upper thermoplastic mold have low-temperature thermoplasticity, can be shaped after heating, and harden and set after cooling.

[0007] Furthermore, a gentle slope is provided at the lower edge of the back plate.

[0008] Furthermore, the slope is 15-35°

[0009] Furthermore, the back plate has a thickness of 3-8 mm.

[0010] Furthermore, the frame is 2 cm thick at the head position, 11 cm thick at the shoulder and neck position, and the frame is 2.5 cm wide.

[0011] Furthermore, the body template, frame, positioning frame and fixing pins are made of carbon fiber material.

[0012] Furthermore, the lower thermoplastic mold and the upper thermoplastic mold are provided with ventilation holes.

[0013] Furthermore, there are 6 to 10 positioning holes, which are evenly distributed along the contour line.

[0014] Compared with the prior art, the utility model has the following beneficial effects:

[0015] The frame and positioning frame of the utility model have the same shape as the contour of the head and shoulders of the human body, and are provided with a lower thermoplastic mold and an upper thermoplastic mold inside which can be hardened and fixed after shaping. After the patient lies down, the lower thermoplastic mold and the upper thermoplastic mold can well wrap the back of the patient's head, the top of the head, the sides of the back of the neck, and the back of the shoulders to improve the fit. The body template and the frame are connected by positioning columns and positioning holes, and the frame, the lower thermoplastic mold and the upper thermoplastic mold are connected as a whole from top to bottom by fixing pins, so as to realize the positioning of the patient and enable the patient to maintain a more comfortable posture. The lower thermoplastic mold and the upper thermoplastic mold can be used repeatedly after being fixed to ensure the repeatability of the radiotherapy position. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0017] Figure 1 It is a structural schematic diagram of the utility model;

[0018] In the figure: 1-body template, 2-lower thermoplastic mold, 3-positioning frame, 4-fixing pin, 5-positioning hole, 6-back plate, 7-frame, 8-headrest, 9-positioning column, 10-fixing hole, 11-through hole, 12-upper thermoplastic mold, 13-through hole. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0020] In the description of the embodiments of the present application, it should be noted that the indicated orientation or position relationship is based on the orientation or position relationship shown in the accompanying drawings, or is the orientation or position relationship in which the product of the application is usually placed when in use, or is the orientation or position relationship commonly understood by technical personnel in this field. It is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0021] In the description of the embodiments of the present application, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set", "install", and "connect" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0022] like Figure 1 As shown, a head stereotactic radiotherapy fixation frame includes a body template 1, a headrest 8, a frame 7, a lower thermoplastic mold 2, an upper thermoplastic mold 12, a positioning frame 3, and a fixing pin 4. Nine positioning holes 5 are provided along the contours of the head, shoulders and neck of the body template 1. The contour of the frame 7 is adapted to the shape of the head and shoulders of the human body. The thickness of the frame 7 at the head position is thinner, the thickness at the shoulder and neck position is thicker and connected to a back plate 6 at the bottom. The lower edge of the back plate 6 is provided with a gentle slope, and the slope angle is 30°. The headrest 8 is positioned and placed on the body template 1. The bottom of the frame 7 at the shoulder and neck position is provided with positioning columns 9 corresponding to the positioning holes 5 at the same position, and the top is provided with a positioning column 9 corresponding to the positioning column 9 at the same position. A corresponding fixing hole 10 is provided, a latch sleeve is embedded in the fixing hole 10, a through hole 13 corresponding to the positioning hole 5 at the same position is provided at the head of the frame, a latch sleeve is embedded in the positioning hole 5 corresponding to the through hole 13, the lower thermoplastic mold 2 is placed in the frame 7, the positioning frame 3 has the same profile as the frame 7, and a through hole 11 corresponding to the fixing hole 10 and the through hole 13 is provided thereon, the body template 1 and the frame 7 are connected through the positioning column 9 and the positioning hole 5, the lower thermoplastic mold 2 and the upper thermoplastic mold 12 are provided with holes corresponding to the positioning hole 5 at the edges, and the fixing pin 4 is inserted into the latch sleeve from top to bottom to connect the frame 7, the lower thermoplastic mold 2, and the upper thermoplastic mold 12 as a whole. The lower thermoplastic mold 2 and the upper thermoplastic mold 12 are provided with air holes.

[0023] Based on the above embodiment, the modeling is performed before radiotherapy. The body template 1 is installed on the radiotherapy bed. The frame 7 is positioned on the body template 1 through the positioning holes 5 and the positioning columns 9. The disassembly is also convenient. The headrest 8 is the same as the frame 7. The body template 1 and the headrest 8 can also be positioned by setting matching positioning holes and positioning columns at the corresponding positions of the headrest 8 to position the headrest 8 on the body template 1. The lower thermoplastic mold 2 and the upper thermoplastic mold 12 have low-temperature thermoplastic properties. They become soft and plastic after heating, and harden and set after cooling. The lower thermoplastic mold 2 is softened and placed on the frame 7, and the positioning The frame 3 is covered on the lower thermoplastic mold 2, and the frame 7, the lower thermoplastic mold 2, and the positioning frame 3 are fixed together from top to bottom by fixing pins 4. The patient lies on the lower thermoplastic mold 2 with his head resting on the headrest 8. After the lower thermoplastic mold 2 is cooled and shaped, the positioning frame 3 is removed, and then the upper thermoplastic mold 12 is placed on the patient's face. The positioning frame 3 is used again to press the upper thermoplastic mold 12 to make it close to the patient's face and shoulders, and fixed with fixing pins 4. After the upper thermoplastic mold 12 is cooled and shaped, the positioning frame 3 is removed. In this way, the body positioning pad (lower thermoplastic mold 2, upper thermoplastic mold 12) for the patient is completed. During radiotherapy, the patient lies on the lower thermoplastic mold 2, the back of the head fits with the headrest 8, the headrest 8 supports the back of the head and the lower thermoplastic mold 2, and the upper thermoplastic mold 12 is covered. The lower thermoplastic mold 2 and the upper thermoplastic mold 12 can fit the back of the patient's head, the top of the head, the sides of the back of the neck, and the back of the shoulders well, preventing the suspension from causing displacement during radiotherapy. The frame 7, the lower thermoplastic mold 2, and the upper thermoplastic mold 12 are connected from top to bottom with the fixing pin 4, the patient's head and shoulders are fixed, and then the accelerator is started to treat the patient by aligning the laser line. After being shaped, the lower thermoplastic mold 2 and the upper thermoplastic mold 12 can be used repeatedly by the same patient to improve the repeatability of positioning.

[0024] In this embodiment, the back plate 6 is 5 mm thick, the frame 7 is 2 cm thick at the head, 11 cm thick at the neck, and 2.5 cm wide. The body template 1, frame 7, positioning frame 3, and fixing pin 4 are made of carbon fiber to reduce the attenuation of radiation.

[0025] Of course, the present invention may have many other embodiments. Without departing from the spirit and essence of the present invention, technicians familiar with the field may make various corresponding changes and deformations based on the present invention, but these corresponding changes and deformations should all fall within the scope of protection of the claims attached to the present invention.

Claims

1. A head stereotactic radiotherapy fixation frame, characterized in that: The invention comprises a body template (1), a headrest (8), a frame (7), a lower thermoplastic mold (2), an upper thermoplastic mold (12), a positioning frame (3), and a fixing pin (4). The body template (1) is provided with a positioning hole (5) along the contour of the head, shoulders and neck. The contour of the frame (7) is adapted to the shape of the head and shoulders of the human body. The frame (7) is thinner at the head position, thicker at the shoulder and neck position and connected to a back plate (6) at the bottom. The headrest (8) is positioned and placed on the body template (1). The frame (7) is provided with a positioning column (9) corresponding to the positioning hole (5) at the same position at the bottom of the shoulder and neck position. The frame (7) is provided with a fixing hole (10) corresponding to the positioning column (9) at the same position at the top. A latch sleeve is embedded in the fixing hole (10). The frame (7) is provided with a positioning column (9) corresponding to the positioning column (9) at the same position at the bottom. There are through holes (13) corresponding to the positioning holes (5) at the same positions, and a latch sleeve is embedded in the positioning holes (5) corresponding to the through holes (13). The lower thermoplastic mold (2) is placed on the frame (7), and the upper thermoplastic mold (12) is placed on the lower thermoplastic mold (2). The edges of the lower thermoplastic mold (2) and the upper thermoplastic mold (12) are provided with holes corresponding to the positioning holes (5). The positioning frame (3) has the same profile as the frame (7), and is provided with through holes (11) corresponding to the fixing holes (10) and the through holes (13). The body template (1) and the frame (7) are connected through the positioning columns (9) and the positioning holes (5). The fixing pins (4) are inserted into the latch sleeve from top to bottom to connect the frame (7), the lower thermoplastic mold (2), and the upper thermoplastic mold (12) as a whole.

2. The head stereotactic radiotherapy fixation frame according to claim 1, characterized in that: The lower thermoplastic mold (2) and the upper thermoplastic mold (12) have low-temperature thermoplasticity and can be shaped after being heated and hardened and shaped after being cooled.

3. The head stereotactic radiotherapy fixation frame according to claim 1, characterized in that: The lower edge of the back plate (6) is provided with a gentle slope.

4. The head stereotactic radiotherapy fixation frame according to claim 3, characterized in that: The slope is 15-35°.

5. The head stereotactic radiotherapy fixation frame according to claim 1, characterized in that: The back plate (6) has a thickness of 3-8 mm.

6. The head stereotactic radiotherapy fixation frame according to claim 1, characterized in that: The frame (7) is 2 cm thick at the head position, 11 cm thick at the shoulder and neck position, and has a width of 2.5 cm.

7. The head stereotactic radiotherapy fixation frame according to claim 1, characterized in that: The body template (1), frame (7), positioning frame (3) and fixing pin (4) are made of carbon fiber material.

8. The head stereotactic radiotherapy fixation frame according to claim 1, characterized in that: The lower thermoplastic mold (2) and the upper thermoplastic mold (12) are provided with ventilation holes.

9. The head stereotactic radiotherapy fixation frame according to claim 1, characterized in that: There are 6 to 10 positioning holes (5) which are evenly distributed along the contour line.

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